Tecogen Inc. Announces Extension of Advisory Agreement with John N. Hatsopoulos to 2028

Key Highlights

• Advisory Agreement Extended: On April 8, 2026, Tecogen Inc. (NYSE American: TGEN) announced the extension of its Advisory Agreement with Mr. John N. Hatsopoulos through March 31, 2028.
• Unanimous Board Approval: The extension was unanimously approved by Written Consent of the Company’s Board of Directors on April 7, 2026.
• Ongoing Strategic Relationship: The Advisory Agreement, originally established on January 18, 2018, and previously amended in 2019 and 2023, emphasizes the ongoing strategic role of Mr. Hatsopoulos within the company.
• Exhibit Filed: The letter agreement extending the term has been filed as Exhibit 99.1 to the Form 8-K.

Details for Investors

Tecogen Inc., a leader in air conditioning and warm air heating equipment, continues to benefit from the guidance of Mr. John N. Hatsopoulos, a well-known figure in the energy and technology sectors. On April 8, 2026, the company entered into a letter agreement to extend the Advisory Agreement with Mr. Hatsopoulos for an additional two years, pushing the expiration date to March 31, 2028.

This extension was unanimously approved by the Board of Directors on April 7, 2026, reflecting strong internal consensus regarding the value of Mr. Hatsopoulos’s contributions. The Advisory Agreement, which began in early 2018 and has since been amended in July 2019 and July 2023, is an important element of Tecogen’s corporate governance and ongoing strategic direction.

Why This Is Important for Shareholders

• Continuity of Strategic Guidance: Mr. Hatsopoulos is considered a significant advisor due to his deep industry experience and has played a key role in Tecogen’s strategy and operations.
• Potential Impact on Share Value: The continuation of this relationship may be viewed positively by investors, as it signals stability and ongoing access to high-level expertise, which could influence Tecogen’s operational performance and strategic decisions.
• Board Support: The unanimous board approval indicates strong alignment within the company’s leadership on this decision.

For compliance and transparency, Tecogen has attached the formal letter agreement as Exhibit 99.1 to the Form 8-K. Investors and analysts are encouraged to review this document for additional context regarding the terms of the extension.

Other Regulatory Disclosures

• No Written Communications, Soliciting Materials, or Tender Offers: The filing confirms that there are no written communications, soliciting material, or pre-commencement communications associated with this event. The company is also not classified as an “emerging growth company.”

Company Information

• Registrant Name: Tecogen Inc.
• Incorporation: Delaware
• Exchange: NYSE American (Ticker: TGEN)
• Headquarters: 76 Treble Cove Road, Building 1, North Billerica, MA 01862
• IRS Employer Identification Number (EIN): 04-3536131
• Contact: (781) 466-6400

Conclusion

This development reflects Tecogen’s commitment to maintaining experienced strategic leadership. As Mr. Hatsopoulos continues his advisory role, shareholders should monitor for further updates regarding company initiatives and performance, as this extension may influence future corporate actions and could have a bearing on share valuation.

Disclaimer: This article is for informational purposes only and does not constitute investment advice. Investors should conduct their own due diligence and consult with financial advisors before making investment decisions. The information provided is based on the company’s SEC filings as of April 8, 2026, and may be subject to change.

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